# \#csp-unit-2 **URL:** https://forum.code.org/tag/csp-unit-2/122.md [Latest](https://forum.code.org/latest.md) · [Categories](https://forum.code.org/categories.md) · [Tags](https://forum.code.org/tags.md) --- ## [Activity Guide Key](https://forum.code.org/t/activity-guide-key/11202)
**Author:** [@huffm](https://forum.code.org/u/huffm)\ **Replies:** 7\ **Last updated:** [April 17, 2026, 11:58am UTC](https://forum.code.org/t/activity-guide-key/11202 "2026-04-17T11:58:14Z")
The number of bytes for the Exabyte is listed as one pentillion, but I believe the correct answer is quintillion. Which is correct? --- ## [Internet videos](https://forum.code.org/t/internet-videos/41804)
**Author:** [@bnclark2](https://forum.code.org/u/bnclark2)\ **Replies:** 0\ **Last updated:** [February 18, 2026, 9:04pm UTC](https://forum.code.org/t/internet-videos/41804 "2026-02-18T21:04:32Z")
I found a video that I thought was interesting. Done by Vox, who did the video about sampling and automating racism from Unit 5. How does the internet work? Does anyone else have any interesting videos about the intern… --- ## [Internet simulator unit 2 lesson 6](https://forum.code.org/t/internet-simulator-unit-2-lesson-6/35154)
**Author:** [@styrrell](https://forum.code.org/u/styrrell)\ **Replies:** 6\ **Last updated:** [October 22, 2025, 2:08pm UTC](https://forum.code.org/t/internet-simulator-unit-2-lesson-6/35154 "2025-10-22T14:08:53Z")
I am typing GET and then the other students name, but I don’t see their internet address anywhere… --- ## [How do routers learn - optional lesson](https://forum.code.org/t/how-do-routers-learn-optional-lesson/41289)
**Author:** [@rsatija](https://forum.code.org/u/rsatija)\ **Replies:** 0\ **Last updated:** [September 15, 2025, 6:00pm UTC](https://forum.code.org/t/how-do-routers-learn-optional-lesson/41289 "2025-09-15T18:00:46Z")
I lost sheets of this optional lesson. Can someone please share the worksheets for the optional lesson on how routers learn? I would really appreciate that. Thank you so much. --- ## [Unit 2 Lesson 6 DNS & HTTP Suggestion](https://forum.code.org/t/unit-2-lesson-6-dns-http-suggestion/33291)
**Author:** [@dahlem\_brian](https://forum.code.org/u/dahlem_brian)\ **Replies:** 2\ **Last updated:** [August 21, 2025, 6:33pm UTC](https://forum.code.org/t/unit-2-lesson-6-dns-http-suggestion/33291 "2025-08-21T18:33:07Z")
Just an idea: I think that lesson 6 kind of stumbles a bit. We’ve been working in the internet simulator so far, we’ve built a network, we have data flowing across the network in packets, we can handle packets that are … --- ## [CSP Unit 2 project - different topics](https://forum.code.org/t/csp-unit-2-project-different-topics/39937)
**Author:** [@katy.fleming](https://forum.code.org/u/katy.fleming)\ **Replies:** 0\ **Last updated:** [October 7, 2024, 3:49pm UTC](https://forum.code.org/t/csp-unit-2-project-different-topics/39937 "2024-10-07T15:49:18Z")
Hello! I’ve noticed the topic of ‘net neutrality’ has gone by the wayside nowadays, and I was wondering if anyone else has chosen a different internet dilemma to replace it. Maybe something around AI? Or does anyone el… --- ## [PearDeck Slides](https://forum.code.org/t/peardeck-slides/36941)
**Author:** [@rsatija](https://forum.code.org/u/rsatija)\ **Replies:** 2\ **Last updated:** [October 21, 2022, 11:52am UTC](https://forum.code.org/t/peardeck-slides/36941 "2022-10-21T11:52:23Z")
Sharing my pear deck slides. Please make a copy. Don’t change my slides. Thanks. APCSP - Unit 1 slides with Pear Deck APCSP - unit 2 slides with Pear Deck APCSP - Unit 3 slides with Pear Deck --- ## [CS Principles: Unit 2 Study Materials](https://forum.code.org/t/cs-principles-unit-2-study-materials/37023)
**Author:** [@mjflip17](https://forum.code.org/u/mjflip17)\ **Replies:** 0\ **Last updated:** [October 5, 2022, 2:12pm UTC](https://forum.code.org/t/cs-principles-unit-2-study-materials/37023 "2022-10-05T14:12:24Z")
Here is a study guide I created for the Unit 2 Test. --- ## [Unit 1 and Unit 2 Project Rubrics to Import for Google Classroom](https://forum.code.org/t/unit-1-and-unit-2-project-rubrics-to-import-for-google-classroom/33328)
**Author:** [@tmezera](https://forum.code.org/u/tmezera)\ **Replies:** 4\ **Last updated:** [June 15, 2022, 12:52pm UTC](https://forum.code.org/t/unit-1-and-unit-2-project-rubrics-to-import-for-google-classroom/33328 "2022-06-15T12:52:14Z")
For any teachers using Google Classroom as their LMS, here are links to the Project Rubrics for Unit 1 and Unit 2. You can make a copy of the google sheet and then import the rubric once you are in google classroom. Note… --- ## [Ok button broken recently?](https://forum.code.org/t/ok-button-broken-recently/35167)
**Author:** [@christian\_stober](https://forum.code.org/u/christian_stober)\ **Replies:** 4\ **Last updated:** [September 24, 2021, 9:41pm UTC](https://forum.code.org/t/ok-button-broken-recently/35167 "2021-09-24T21:41:05Z")
Has anyone else experienced an issue recently where the “OK” button isn’t working on dialog boxes that show up with a new activity? Starting a week or two ago, neither me nor my students have working OK buttons. You can … --- ## [Router and/or Switch? (Unit 2 - Lesson 4: Lesson 4: Routers and Redundancy)](https://forum.code.org/t/router-and-or-switch-unit-2-lesson-4-lesson-4-routers-and-redundancy/35140)
**Author:** [@wbarnum](https://forum.code.org/u/wbarnum)\ **Replies:** 2\ **Last updated:** [September 20, 2021, 5:07pm UTC](https://forum.code.org/t/router-and-or-switch-unit-2-lesson-4-lesson-4-routers-and-redundancy/35140 "2021-09-20T17:07:50Z")
Would it be accurate to describe the “routers” in the “Internet Simulator” on Unit 2 - Lesson 4 - Level 1 as acting as both routers and switches? They are connecting one network to another (router) and connecting comput… --- ## [CSP 2020 Unit2 Digital Dilemmas](https://forum.code.org/t/csp-2020-unit2-digital-dilemmas/33984)
**Author:** [@hhook](https://forum.code.org/u/hhook)\ **Replies:** 0\ **Last updated:** [January 5, 2021, 5:01pm UTC](https://forum.code.org/t/csp-2020-unit2-digital-dilemmas/33984 "2021-01-05T17:01:35Z")
Hi everyone, The answer key for the digital dilemmas project has an exemplar for net neutrality but not for digital divide or internet censorship. Does anyone have a nice exemplar they would be willing to share? Thanks… --- ## [Answer Key Issues](https://forum.code.org/t/answer-key-issues/19107)
**Author:** [@jjoseph](https://forum.code.org/u/jjoseph)\ **Replies:** 8\ **Last updated:** [November 5, 2020, 6:31pm UTC](https://forum.code.org/t/answer-key-issues/19107 "2020-11-05T18:31:30Z")
The U2L05 worksheet does not match the answer key. It looks like the activity guide/worksheet must have been updated, but the answer document has not been updated. --- ## [How to deal with add number of students when working in pairs](https://forum.code.org/t/how-to-deal-with-add-number-of-students-when-working-in-pairs/33290)
**Author:** [@jack.hazard](https://forum.code.org/u/jack.hazard)\ **Replies:** 1\ **Last updated:** [September 8, 2020, 9:13pm UTC](https://forum.code.org/t/how-to-deal-with-add-number-of-students-when-working-in-pairs/33290 "2020-09-08T21:13:54Z")
I am working on UNIT 2 with my students - the internet Unit - in the CS principals class. I have 7 students so i will not have an ever number for break out sessions. What do I do? --- ## [Unit 2 Lesson 1 Why is the decimal level of abstraction necessary? Why can't a program just translate binary directly into text?](https://forum.code.org/t/unit-2-lesson-1-why-is-the-decimal-level-of-abstraction-necessary-why-cant-a-program-just-translate-binary-directly-into-text/33215)
**Author:** [@linda.henneberg](https://forum.code.org/u/linda.henneberg)\ **Replies:** 3\ **Last updated:** [September 1, 2020, 2:37am UTC](https://forum.code.org/t/unit-2-lesson-1-why-is-the-decimal-level-of-abstraction-necessary-why-cant-a-program-just-translate-binary-directly-into-text/33215 "2020-09-01T02:37:11Z")
We were doing the intro lesson to the internet simulator, and a student asked me why the computer even needed the decimal number, and why couldn’t it just take the binary and translate that directly into text. I tried ex… --- ## [Unit 2 Chapter 1 Assessment (Lesson 1 to 6)](https://forum.code.org/t/unit-2-chapter-1-assessment-lesson-1-to-6/5701)
**Author:** [@dani](https://forum.code.org/u/dani)\ **Replies:** 34\ **Last updated:** [February 11, 2020, 1:47am UTC](https://forum.code.org/t/unit-2-chapter-1-assessment-lesson-1-to-6/5701 "2020-02-11T01:47:27Z")
Share your assessments for Unit 2 Chapter 1. --- ## [Unit 2, Lesson 4, Activity 7: the bee](https://forum.code.org/t/unit-2-lesson-4-activity-7-the-bee/24793)
**Author:** [@mgunn](https://forum.code.org/u/mgunn)\ **Replies:** 1\ **Last updated:** [February 12, 2019, 11:31pm UTC](https://forum.code.org/t/unit-2-lesson-4-activity-7-the-bee/24793 "2019-02-12T23:31:31Z")
“This larger image of a bee…Here’s another mind-blowing thing to try: slide the bits per pixel up to 24 bits per pixel. What happens? Can you explain this behavior?” Can someone explain what is happening here? Why the d… --- ## [Color images to padlet](https://forum.code.org/t/color-images-to-padlet/24295)
**Author:** [@kallen](https://forum.code.org/u/kallen)\ **Replies:** 1\ **Last updated:** [January 24, 2019, 6:15pm UTC](https://forum.code.org/t/color-images-to-padlet/24295 "2019-01-24T18:15:52Z")
When working on encoding color images, I’ve read other teachers display the students’ images on padlet. Can anyone tell me what a good way is to get the students’ images from the widget into padlet? Is there something e… --- ## [Explanation of "One-Pager" is on activity guide for lesson 4.04](https://forum.code.org/t/explanation-of-one-pager-is-on-activity-guide-for-lesson-4-04/23152)
**Author:** [@claudetteguy16](https://forum.code.org/u/claudetteguy16)\ **Replies:** 5\ **Last updated:** [January 20, 2019, 5:56pm UTC](https://forum.code.org/t/explanation-of-one-pager-is-on-activity-guide-for-lesson-4-04/23152 "2019-01-20T17:56:32Z")
Hi Folks, Just a helpful hint that there is a paragraph explanation of a “One-Pager” in U4L04 Activity Guide - Rapid Research - Data Innovations in lesson 4.04. You may want to include it in this lesson since it is the… --- ## [Unit 2 Binder Divider Page](https://forum.code.org/t/unit-2-binder-divider-page/23601)
**Author:** [@nicole](https://forum.code.org/u/nicole)\ **Replies:** 0\ **Last updated:** [December 19, 2018, 2:22am UTC](https://forum.code.org/t/unit-2-binder-divider-page/23601 "2018-12-19T02:22:40Z")
This year I’ve been making an interactive notebook. To help students stay organized, I’ve created unit pages to divide the different units. For unit 2 I also created a check off list of the programs they need to comple… --- ## [Help with Unit 2 Test, Question 4](https://forum.code.org/t/help-with-unit-2-test-question-4/23104)
**Author:** [@oumerch](https://forum.code.org/u/oumerch)\ **Replies:** 1\ **Last updated:** [December 5, 2018, 11:05pm UTC](https://forum.code.org/t/help-with-unit-2-test-question-4/23104 "2018-12-05T23:05:58Z")
The answers for question 4 on the unit 2 test are presented as such: 2^16 Is this 2 to the 16th power? Is this 2 times 16? I’m trying to understand. Thanks! --- ## [Hexadecimal Color](https://forum.code.org/t/hexadecimal-color/22209)
**Author:** [@anthony\_dellarosa](https://forum.code.org/u/anthony_dellarosa)\ **Replies:** 3\ **Last updated:** [November 16, 2018, 1:42am UTC](https://forum.code.org/t/hexadecimal-color/22209 "2018-11-16T01:42:22Z")
Anyone having trouble explaining the hexadecimal to color activity that was optional? --- ## ['16-'17 General Discussion for Lesson 2.5](https://forum.code.org/t/16-17-general-discussion-for-lesson-2-5/5155)
**Author:** [@brook](https://forum.code.org/u/brook)\ **Replies:** 11\ **Last updated:** [November 8, 2018, 2:16pm UTC](https://forum.code.org/t/16-17-general-discussion-for-lesson-2-5/5155 "2018-11-08T14:16:50Z")
Use this thread to discuss your questions and comments about how to run the lesson. --- ## [Extension: Magnify an Image](https://forum.code.org/t/extension-magnify-an-image/21649)
**Author:** [@fair.danielle](https://forum.code.org/u/fair.danielle)\ **Replies:** 3\ **Last updated:** [November 6, 2018, 5:37am UTC](https://forum.code.org/t/extension-magnify-an-image/21649 "2018-11-06T05:37:21Z")
Just wondering if there is an answer key for the Extension Activity: Modify an Image. Thanks! --- ## [Does this prompt need to be revised](https://forum.code.org/t/does-this-prompt-need-to-be-revised/21602)
**Author:** [@claudetteguy16](https://forum.code.org/u/claudetteguy16)\ **Replies:** 2\ **Last updated:** [November 1, 2018, 2:49pm UTC](https://forum.code.org/t/does-this-prompt-need-to-be-revised/21602 "2018-11-01T14:49:51Z")
The Getting Started Prompt for Unit 2 Lesson 1 says: \_Prompt: In Unit 1 we learned that in addition to the actual text of a document, it is usually necessary to store the formatting information that allows the text to b… --- ## [Small changes to make a big difference](https://forum.code.org/t/small-changes-to-make-a-big-difference/20511)
**Author:** [@kaitie\_obryan](https://forum.code.org/u/kaitie_obryan)\ **Replies:** 9\ **Last updated:** [October 18, 2018, 3:34am UTC](https://forum.code.org/t/small-changes-to-make-a-big-difference/20511 "2018-10-18T03:34:03Z")
This year I really challenged my students to get creative with this lesson. When ever they asked me if it was “good enough” I said “eh… it would be good to get something extra in there…” a lot of students added shading … --- ## [Lyrics and music video - extension](https://forum.code.org/t/lyrics-and-music-video-extension/6032)
**Author:** [@jonbagby15](https://forum.code.org/u/jonbagby15)\ **Replies:** 4\ **Last updated:** [October 10, 2018, 4:23am UTC](https://forum.code.org/t/lyrics-and-music-video-extension/6032 "2018-10-10T04:23:07Z")
Here are the lyrics and music video for a great song that lends itself to text compression. https://www.google.com/search?safe=active&q=heuristic&ie=utf-8&oe=utf-8#safe=strict&q=who+put+the+bomp+lyrics --- ## [Compression Heuristic](https://forum.code.org/t/compression-heuristic/20405)
**Author:** [@rgupta](https://forum.code.org/u/rgupta)\ **Replies:** 1\ **Last updated:** [October 10, 2018, 4:19am UTC](https://forum.code.org/t/compression-heuristic/20405 "2018-10-10T04:19:31Z")
The heuristic I developed is to consider first a repeated phrase, compress it, then a repeated sequence of phrases, and compress those, and to then look for more simple terms and to compress. Generally, I’m looking at la… --- ## [2.6 Rapid Research - Files and Formats One Pager Exemplar](https://forum.code.org/t/2-6-rapid-research-files-and-formats-one-pager-exemplar/20672)
**Author:** [@sam\_stafford](https://forum.code.org/u/sam_stafford)\ **Replies:** 0\ **Last updated:** [October 9, 2018, 3:12am UTC](https://forum.code.org/t/2-6-rapid-research-files-and-formats-one-pager-exemplar/20672 "2018-10-09T03:12:23Z")
Hi All, I saw many great examples for the 2.6 Format Showdown computational artifacts but I couldn’t find an exemplar for the one pager. I created one and hopefully you can use it as an example for your students ( good … --- ## [Sample Artifacts for Rapid Research - Format Showdown](https://forum.code.org/t/sample-artifacts-for-rapid-research-format-showdown/20249)
**Author:** [@wbarnum](https://forum.code.org/u/wbarnum)\ **Replies:** 3\ **Last updated:** [October 5, 2018, 3:07pm UTC](https://forum.code.org/t/sample-artifacts-for-rapid-research-format-showdown/20249 "2018-10-05T15:07:02Z")
Does anyone have any artifacts for Rapid Research - Format Showdown (new 2.6) that they would be willing to share? Thanks, Bill [Next page](https://forum.code.org/tag/csp-unit-2/122.md?match_all_tags=true&page=1&tags%5B%5D=csp-unit-2)